Hi Olof,
Did you find a solution to this? I have similar need as yours this time.
A.C.
"Olof =?UTF-8?Q?N=C3=A6ss=C3=A9n" ?= wrote:
>
> I have a problem with using forms in components where the data model
> is passed to the components via parameter inside a T5 loop component.
> When a form is submitted the data model seems to be lost.
>
> What I'm trying to do is to iterate through a collection of users and
> construct a form for each user where a user name can be edited. Each
> form resides in a component that handles submission. The user model
> data is passed to the component inside a page where a loop loops
> through a collection of users. The idea is to have a form for each
> user so when submitting a form, only the user edited will get updated.
> However, when a form is submitted the user data model is lost and ends
> up as a null pointer.
>
> I wouldn't be surprised if I've missed something obvious or if the way
> I try to achieve a form for each user isn't a valid usage of T5. Any
> thoughts or suggestions? I've attached a simple example demonstrating
> my approach in this email.
>
> /Olof
>
> // User.java Data Model
> package org.example;
>
> public class User
> {
> private String name;
>
> public User(String name)
> {
> this.name = name;
> }
>
> public String getName()
> {
> return name;
> }
>
> public void setName(String name)
> {
> this.name = name;
> }
> }
>
> //Users.java T5 Page
> package org.example.testapp.pages;
>
> import java.util.ArrayList;
> import java.util.List;
>
> import org.apache.tapestry.annotations.Persist;
> import org.example.User;
>
> public class Users
> {
> private User user;
>
> @Persist("flash")
> private List<User> users;
>
> public void onActivate()
> {
> if (users == null)
> {
> users = new ArrayList<User>();
> users.add(new User("Ted"));
> users.add(new User("Olof"));
> }
> }
>
> public User getUser()
> {
> return user;
> }
>
> public void setUser(User user)
> {
> this.user = user;
> }
>
> public List<User> getUsers()
> {
> return users;
> }
> }
>
> // Users.html T5 Template
> <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
> <head>
> </head>
> <body>
> <t:loop source="users" value="user">
> <t:edituser user="user"/>
> </t:loop>
> </body>
> </html>
>
> //EditUser.java T5 Component
> package org.example.testapp.components;
>
> import org.apache.tapestry.annotations.Parameter;
> import org.example.User;
>
> public class EditUser
> {
> @Parameter(required = true)
> private User user;
>
> public void setUser(User user)
> {
> this.user = user;
> }
>
> public User getUser()
> {
> return user;
> }
>
> public void onSuccess()
> {
> // save user
> }
> }
>
> //EditUser.html T5 Template
> <t:form xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
> <t:textfield value="user.name"/><br/>
> <t:submit t:id="save" value="save"/>
> </t:form>
>
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>
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